[src/trunk]: src/sys/arch/arm/acpi Add GICv3 ITS support

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/309edb0b2d84
branches:  trunk
changeset: 445704:309edb0b2d84
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri Nov 09 23:36:58 2018 +0000

description:
Add GICv3 ITS support

diffstat:

 sys/arch/arm/acpi/gicv3_acpi.c |  44 ++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 42 insertions(+), 2 deletions(-)

diffs (96 lines):

diff -r 7ee1a9923755 -r 309edb0b2d84 sys/arch/arm/acpi/gicv3_acpi.c
--- a/sys/arch/arm/acpi/gicv3_acpi.c    Fri Nov 09 23:36:24 2018 +0000
+++ b/sys/arch/arm/acpi/gicv3_acpi.c    Fri Nov 09 23:36:58 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: gicv3_acpi.c,v 1.1 2018/10/21 21:18:41 jmcneill Exp $ */
+/* $NetBSD: gicv3_acpi.c,v 1.2 2018/11/09 23:36:58 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
 #define        _INTR_PRIVATE
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: gicv3_acpi.c,v 1.1 2018/10/21 21:18:41 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: gicv3_acpi.c,v 1.2 2018/11/09 23:36:58 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -47,12 +47,15 @@
 #include <dev/fdt/fdtvar.h>
 
 #include <arm/cortex/gicv3.h>
+#include <arm/cortex/gicv3_its.h>
 #include <arm/cortex/gic_reg.h>
 
 #define        GICD_SIZE       0x10000
 #define        GICR_SIZE       0x20000
+#define        GITS_SIZE       0x20000
 
 extern struct bus_space arm_generic_bs_tag;
+extern struct arm32_bus_dma_tag arm_generic_dma_tag;
 
 struct gicv3_acpi_softc {
        struct gicv3_softc      sc_gic;
@@ -65,6 +68,7 @@
 
 static int     gicv3_acpi_map_dist(struct gicv3_acpi_softc *);
 static int     gicv3_acpi_map_redist(struct gicv3_acpi_softc *);
+static int     gicv3_acpi_map_its(struct gicv3_acpi_softc *);
 
 CFATTACH_DECL_NEW(gicv3_acpi, sizeof(struct gicv3_acpi_softc), gicv3_acpi_match, gicv3_acpi_attach, NULL, NULL);
 
@@ -99,6 +103,7 @@
 
        sc->sc_gic.sc_dev = self;
        sc->sc_gic.sc_bst = &arm_generic_bs_tag;
+       sc->sc_gic.sc_dmat = &arm_generic_dma_tag;
        sc->sc_madt_gicd = gicd;
 
        aprint_naive("\n");
@@ -122,6 +127,8 @@
                return;
        }
 
+       gicv3_acpi_map_its(sc);
+
        arm_fdt_irq_set_handler(gicv3_irq_handler);
 }
 
@@ -264,3 +271,36 @@
 
        return 0;
 }
+
+static ACPI_STATUS
+gicv3_acpi_map_gits(ACPI_SUBTABLE_HEADER *hdrp, void *aux)
+{
+       struct gicv3_acpi_softc * const sc = aux;
+       ACPI_MADT_GENERIC_TRANSLATOR *gits;
+       bus_space_handle_t bsh;
+
+       if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_TRANSLATOR)
+               return AE_OK;
+
+       gits = (ACPI_MADT_GENERIC_TRANSLATOR *)hdrp;
+
+       if (bus_space_map(sc->sc_gic.sc_bst, gits->BaseAddress, GITS_SIZE, 0, &bsh) != 0) {
+               aprint_error_dev(sc->sc_gic.sc_dev, "failed to map ITS at 0x%" PRIx64 " len %#x\n",
+                   gits->BaseAddress, GITS_SIZE);
+               return AE_OK;
+       }
+
+       aprint_normal_dev(sc->sc_gic.sc_dev, "ITS #%#x at 0x%" PRIx64 "\n", gits->TranslationId, gits->BaseAddress);
+
+       gicv3_its_init(&sc->sc_gic, bsh, gits->BaseAddress, gits->TranslationId);
+
+       return AE_OK;
+}
+
+static int
+gicv3_acpi_map_its(struct gicv3_acpi_softc *sc)
+{
+       acpi_madt_walk(gicv3_acpi_map_gits, sc);
+
+       return 0;
+}